On 4/30/2018 9:54 PM, Pierre-Louis Bossart wrote:
On 4/30/18 4:23 AM, Akshu Agrawal wrote:
Non-dts based systems can use ACPI DSDT to pass on the mclk
to da7219.
This enables da7219 mclk to be linked to system clock.
Enable/Disable of the mclk is already handled in the codec so
platform drivers don't have to explicitly do handling of mclk.
Signed-off-by: Akshu Agrawal <akshu.agrawal@xxxxxxx>
---
v2: Fixed kbuild error
include/sound/da7219.h | 2 ++
sound/soc/codecs/da7219.c | 7 ++++++-
2 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/include/sound/da7219.h b/include/sound/da7219.h
index 1bfcb16..df7ddf4 100644
--- a/include/sound/da7219.h
+++ b/include/sound/da7219.h
@@ -38,6 +38,8 @@ struct da7219_pdata {
const char *dai_clks_name;
+ const char *mclk_name;
+
/* Mic */
enum da7219_micbias_voltage micbias_lvl;
enum da7219_mic_amp_in_sel mic_amp_in_sel;
diff --git a/sound/soc/codecs/da7219.c b/sound/soc/codecs/da7219.c
index 980a6a8..aed68a4 100644
--- a/sound/soc/codecs/da7219.c
+++ b/sound/soc/codecs/da7219.c
@@ -1624,6 +1624,8 @@ static struct da7219_pdata
*da7219_fw_to_pdata(struct snd_soc_component *compone
dev_warn(dev, "Using default clk name: %s\n",
pdata->dai_clks_name);
+ device_property_read_string(dev, "dlg,mclk-name",
&pdata->mclk_name);
+
if (device_property_read_u32(dev, "dlg,micbias-lvl", &of_val32)
>= 0)
pdata->micbias_lvl = da7219_fw_micbias_lvl(dev, of_val32);
else
@@ -1905,7 +1907,10 @@ static int da7219_probe(struct
snd_soc_component *component)
da7219_handle_pdata(component);
/* Check if MCLK provided */
- da7219->mclk = devm_clk_get(component->dev, "mclk");
+ if (da7219->pdata->mclk_name)
+ da7219->mclk = clk_get(NULL, da7219->pdata->mclk_name);
+ if (!da7219->mclk)
+ da7219->mclk = devm_clk_get(component->dev, "mclk");
this looks weird, why are you using different clk functions depending on
the existence of a _DSD property? Why not just change the name and keep
the same flow, e.g something like
if(!da7219->pdata->mclk_name)
da7219->pdata->mclk_name = "mclk";
da7219->mclk = devm_clk_get(component->dev, da7219->pdata->mclk_name);
We can't use devm_clk_get as the value of dev argument has to be NULL,
which can not be used with devm_clk_get.
System clock which are linked to mclk are registered by a separate ACPI
device. And this exposing of DSD property is for all those platforms
which are non-dts based.
if (IS_ERR(da7219->mclk)) {
if (PTR_ERR(da7219->mclk) != -ENOENT) {
ret = PTR_ERR(da7219->mclk);
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